Colored Mulch Experiment - Knowledgebase Question

Do you know where I can get colored plastic mulch-red, blue, green or yellow? I'm using it for a science experiment where I'll be growing spinach to see if color has an effect on its growth. I'm a seventh grader and I'm interested in the work Micheal Kasperbauer has done on this subject. Apparently the light reflected off the colored mulch effects the plant's growth. I will be growing Burpee's Baby Leaf Hybrids Spinach and I'll be planting it in pots outside in Richmond by Oct. 23. Do you have any advice about growing spinach here this time of year? I know we may need to cover it or bring it inside if we have a frost.

of your experiment. Our Education Dept. is always looking for interesting projects to discuss in their newsletter. Good luck!
of your experiment. Our Education Dept. is always looking for interesting projects to discuss in their newsletter. Good luck!